This is the 77th most frequent Chinese word.
世界
"World" or "universe."
Here, '世界' is used to represent the physical world, the Earth.
世界很大，还有很多值得探索的地方。
The world is vast, and there are many places worth exploring.
In this sentence, '世界' metaphorically refers to one's personal sphere or realm of importance.
在我的世界里，朋友和家人是最重要的。
In my world, friends and family are the most important.
Here, '世界' represents the perspective or way of seeing life as depicted in the artworks.